@dknguyen: Again - not looking to argue with 5,632 posts ;D - but I know from my rudimentary physics knowledge that P=VI ...so, if the Amp is drawing a max of 0.3A at about 13V, then shouldn't it only need 4 watts?
I think taking the rms of the speakers into account might be wrong, as they are actually only using as much power as the amp can supply... speaking of which, the amp's website says: "The output power is around 2x25W RMS maximum, into 4 ohms at 10% THD+N. Up to about 2X15W, the THD+N is below 0.1%"
The webpage also shows the amp being used with a 35W SMPS. I think the power requirements of the amp are a bit below 60W. Sorry for misleading you with the speaker specs.